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3 Sheets-Sheet 1. W. PIGHNO.

SPADE PLOW.

(No Model.)

No. 476,684. Patented June 7, 1892.

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3 Sheets-Sheet 2.

[No Model.)

W. PIGHNO.

SPADE PLOW.

atented June 7, 1892.

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SPADE PLOW.

No. 476,684. Patented June 7, 1892.

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UNITED STATES PATENT OFFICE.

IVASILI PIOHNO, OF KIEV, RUSSIA.

SPADE-PLOW.

SPECIFICATION forming part of Letters Patent No. 476,684, dated June '7,1892.

Application filed February 26,1892. Serial No. 422,886. (No model.)

To all whom it may concern:

Be it known that I, IVASILI PICHNO, a subject of the Emperor of Russia,residing at Kiev, Russia, have invented certain new and usefulImprovements in Spade-Flows, of which the following is a specification.

The present invention relates to a plow in which the plowshare is in theshape of a vertical coucavo-convex disk, which turns the furrow byrevolving under the traveling action of the carriage. The plowing effectmay be increased by providing the share peripherally with a series ofspades.

In the accompanying drawings, forming a part of this specification,Figures 1, 2, and 3 are a side, plan, and longitudinal section,respectively, of a plow embodying myimprovements. Figs. 4, 5, and 6 area vertical section side, and rearviewof the plowshare and partsmoreimmediately connected therewith.

The beam a is fastened below the axle d, and upon the ends of the latterare mounted the carrying-wheels Z) c. Fastening to the beam a byscrew-bolts e f is a plate g, the bolt 6 forming a pivot for the same,while the bolt f admits of the adjustmentof the plate by playing in asegmental slot in the same. The vertical concavo-convex plowshare Z isprovided peripherally with a series of spades m, and said share Z issuspended from the plate g through the medium of a horizontal stub-shaftis, carrying at one end plate 91, rigidly bolted to said share at therear thereof, said shaftk bearing in boxes 19 1), connected to the plateg. By loosening the screwf, moving plate g, and again tightening saidscrew the plowshare Z can be adjusted to occupy a greater or lesslateral inclination relative to the longitudinal axis of the machine. Onthe carriage, in the rear of the axle d, a tool-box r is mounted, thecover 8 of which forms a seat for the driver.

In use the plowsharelmust be set so that its shaft will be at an anglerelative to the sequently vary the position of the plow Z to cause it toout deeper or shallower, as may be found desirable. It will beunderstood that the concavo-convex plowshare may be used minus thespades.

1. In a plow, the combination of a supporting-frame, a horizontaladjustable plate secured thereto to rock on bolt e, means, substantiallyas described, for clamping said plate in the desired adjustment, thestubshaft mounted in the boxes carried by said plate, and theconcavo'convex disk rigidly secured on one end of said shaft,substantially as set forth.

2. In a plow, the combination of the wheeled supporting-frame, a platesecured thereto and horizontal adjustable means for clamping the platein the desired adjustment, boxes carried by said plate, a stub-shaftmounted in said boxes and provided with a plate 72, rigid on one end,the concavo-convex disk Z, rigidly secured to said plate 92, and theinclined spades rigid with and projecting from the edges of said disk,substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WASILI PICHNO. itnesses:

W. FRISK, G. N. MANACPRULZ.

